I got new 2 Fi 18's Q series unloaded, no options on them at all. whats the most amount of RMS power I can put on each one???? Im getting the Audiopipe 3000d amp and wiring them at 2 ohms and that would put 1500 rms on them.

Well, it's not exactly rocket science or any kind of absolute. It has to do with your listening habits, the enclosure and it's tuning, and how you set your gains. If the enclosure is built and tuned correctly, assuming it's ported, AND you set your gains conservatively, you shouldn't have any problems as long as you listen for stress from them while playing them, especially when you get happy with the volume knob, otherwise you should be fine. There's no definite answer. I've seen a 100watt rated speaker take a wall socket for over 15 minutes without giving up. I've also seen a sub rated for 900wrms blown with a 250wrms amp. It all depends on application and execution.